here you go...i think the grey and black is the best here.
I think I like the red, but it's hard being as the pics are all different. It'd be best if we got one good pic and had someone photochop them in diff colors.
Also, while I like the red, I think there are better shades of red to go with.
As for the yellow, I have a yellow car now and it looks great. But it doesn't seem to work with that shade of yellow in that car in that pic. Just looks too loud.